CORTLAND — When Darrelle Revis left Fischer Sports Physical Therapy, his personal trainer, Will Sullivan, believed the Pro Bowl cornerback was poised to have a another huge season in 2010.

“He left here two days before training camp in great shape, ready for the season,” Sullivan, who trains elite NFL athletes in Phoenix and has been working with Revis since he was a junior in college, told The Post yesterday. “I train a lot of Pro Bowl receivers so I gave him insight breaking down some of the new receivers he would face this year.”

One of those receivers, Anquan Boldin, is also a client of Sullivan’s. Boldin, now with the Ravens, is due to face the Jets in the season opener. The question is whether Revis will be signed, in uniform and ready to cover him by then.

Sullivan said he and Revis “talked about” his contract dispute with the Jets all last month while Revis was in Phoenix and, Sullivan said, the last thing Revis wanted to happen was exactly what’s unfolded: a protracted holdout with little progress being made.

“I text him probably once a week, and I can tell you that the last thing he is is the selfish athlete people want to make him out to be,” Sullivan said. “There is nothing more that he wants to do than just play football. He just wants to play football. He doesn’t want to be sitting at home playing video games. He’s a football player and he wants to be on the football field.”

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Jets backup QB Kellen Clemens is a bit confused. He entered this training camp believing he was in competition for the No. 2 job, yet without a single preseason game played, Ryan already has called Mark Brunell “a lock” as the No. 2.

“It wasn’t much of a competition,” Clemens said. “I think this one was kind of mapped out on how it was going to be. That’s the way Rex had it in mind.”

Asked if he was led to believe there was an “open competition” for the No. 2 job entering camp, Clemens said, “That was my understanding.”

Asked if he felt “hoodwinked” by Ryan, who’s usually up front with his players, Clemens said, “I think [that word] works there. There’s a difference between being the quarterback of a coach that drafted you and being a quarterback of a coach that didn’t.”

The irony is that Clemens has looked good this camp, and is having perhaps the best camp of his career.

“I’ve played well,” he said. “I’ve played good ball.”

Asked if he’s setting his sights on the No. 3 job, which Kevin O’Connell also is competing for, Clemens said, “That’s about all that’s left.”

The question is whether the Jets keep Clemens, who’s due to make $1.176 million this year, as the No. 3 or try to trade him before the season.

“There are a lot of possibilities and I’d say that’s probably one of them,” Clemens said.

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The Jets got a scare in yesterday’s morning practice when center Nick Mangold was shaken up after being hit by DT Sione Pouha in an individual drill on which Pouha jumped a hard count and hit him in the side of the head.

Mangold, who was replaced by Rob Turner in team drills, stood and watched the rest of practice.

Mangold, who is making $3.3 million in the final year of his rookie contract, decided to come to training camp despite not getting the new deal he wanted.